Desloratadine EP Impurity B Catalogue D225632 CAS 183198-49-4 M.W 310.82 M.F C19H19ClN2 Specifications FAQs Synonyms: 8-Chloro-6,11-dihydro-11-(1,2,3,6-tetrahydro-4-pyridinyl)-5H-benzo[5,6]cyclohepta[1,2-b]pyridine